Mark Galeotti is one of the world's leading experts on Russian crime and security (which are often one and the same), which may explain why Moscow banned him in 2022. After a stint with the Foreign Office, he has been a scholar and think-tanker in London, New York, Moscow, Prague and Florence. He now heads the consultancy Mayak Intelligence and is an honorary professor at University College London and a senior fellow with RUSI and the Council on Geostrategy. A prolific author, he frequently acts as consultant to various government, commercial and law-enforcement agencies and has briefed everyone from prime ministers to CEOs.